We have compiled these questions in order to answer some of the most common queries we receive. We offer free technical/installation advice and are happy to talk through your individual requirements so please do not hesitate to contact us with your questions.

1. What type of inverter do I need?
There are two main types of inverter Modified, sometimes called quasi and pure sine, sometimes called true sine. The difference is the type of electrical waveform they produce.

Modified Sine produces a square waveform. This means that they are suitable for running items such as lights but cannot run anything that is electronically sophisticated or variable speed. You can also experience interference with TV's, Radios and Computers.

Pure Sine produces a clean waveform just like the normal mains supply and are needed for delicate electrical or electronic items such as stereos, Laptops and anything variable speed.

At Power Master we only sell Pure Sine inverters as they offer the best performance and compatibility with today's modern products.

2. What size inverter do I need?
The size you need depends on the amount of power you require from the inverter. In order to determine this you will need to check and list the power rating of all the equipment you wish to run from the inverter.

Equipment (like inverters) will normally have two ratings the continuous power and the peak/maximum power. For example a microwave could be 850W but its peak power could be as high as 2500W.

So go through what equipment you will be using and what it's combined power is. You will need to take into account what items will be on at the same time and for how long etc..

This will then give you the size of inverter you need eg: 350W up to 3000W.

When comparing inverters you need to check that the power rating given is its continuous power NOT it's peak power eg: 1200W continuous power 3600W Peak Power.

If you would like to talk your requirements through then please do not hesitate to contact us we are very experienced at offering advice and guidance on all aspects of your product choice.

3. What size battery bank should I have?
In order to decide this you should first assess your power needs as detailed in "What size inverter do I need?". From this you will be able to determine what power you will need in order to meet your specific requirements. The general rule is that you can never have too many batteries! Of course there may be space restrictions, which necessitate a certain number.

To give you an idea one 110ah 12V battery can provide 500W of continuous power for approx 1hour 20mins.

We do not recommend any heavier load than this per battery. More batteries means less load on each battery and so a longer duration and longer battery life.

This is based on using a Power Master inverter which efficiency ratings of between 85-90%. Our inverters are "low frequency" which means they using low frequency switching with large Toroidal output transformers to give higher efficiencies.

All figures quoted are approximate and based on batteries in good condition.

4. What size battery charger do I need?
The Power Master range of intelligent battery chargers are available in 12V or 24V and range from 6amp up to 50Amp. The size of charger you will need depends on your battery usage.

You should consider;
How often will I need to recharge my batteries?
How long/often will I have access to mains?
How quickly do I need to re-charge?

The size of charger you will need depends on all of the above but obviously the larger unit you have the quicker it will recharge your battery bank.

If you need more help on this then please contact us for advice.

5. Can I install Power Master products myself?
It is possible to install our products yourself but we recommend that you use a qualified electrician/electrical engineer. It is your responsibility to ensure that any installation meets all the relevant regulations/requirements. We are happy to advise your engineer on the installation and we may also be able to put you in touch with a qualified installer in your area.

6. Where should I install my Inverter/Battery Charger?
As detailed in "Can I install power Master products myself?" We recommend you use a qualified electrician/electrical engineer to install your Power Master products. We provide a manual with your product, which gives details on the installation requirements or you can call us and we will advise.

7. What warranty do Power Master offer?
Power Master products are covered by a 2 year return to base warranty. Please contact us if you require further details on the warranty we provide.

Customer satisfaction is our prime concern and we endeavour to resolve any queries as quickly as possible.

8. How do I order?
Please click on the "How to order" page on the left of your screen.

9. Delivery of my order?
Please click on the "How to order" page on the left of your screen.